<template>
    <div class="auth-page">
        <div class="container page">
            <div class="row">

                <div class="col-md-6 offset-md-3 col-xs-12">
                    <h1 class="text-xs-center">{{ isLogin ? 'Sign in' : 'Sign up' }}</h1>
                    <p class="text-xs-center">
                        <!-- <a href="">Have an account?</a> -->
                        <nuxt-link v-if="isLogin" to="/register">Need an account?</nuxt-link>
                        <nuxt-link v-else to="/login">Have an account?</nuxt-link>
                    </p>

                    <ul class="error-messages">
                        <template v-for="(messages, field) in errors">
                            <li v-for="(message, index) in messages" :key="index">{{ field }} {{message}}</li>
                        </template>
                    </ul>

                    <form @submit.prevent="onSubmit">
                        <fieldset class="form-group" v-if="!isLogin">
                            <input v-model="user.username" class="form-control form-control-lg" type="text" placeholder="Your Name" required>
                        </fieldset>
                        <fieldset class="form-group">
                            <input v-model="user.email" class="form-control form-control-lg" type="email" placeholder="Email" required>
                        </fieldset>
                        <fieldset class="form-group">
                            <input v-model="user.password" class="form-control form-control-lg" type="password" placeholder="Password" minlength="8" required>
                        </fieldset>
                        <button class="btn btn-lg btn-primary pull-xs-right">
                            {{ isLogin ? 'Sign in' : 'Sign up' }}
                        </button>
                    </form>
                </div>

            </div>
        </div>
    </div>
</template>

<script>
    import { login, register } from '../api/user'

    // 仅在客户端加载 js-cookie 包
    const Cookie = process.client ? require('js-cookie') : undefined

    export default {
        middleware: 'notAuthenticated',
        name: 'LoginIndex',
        computed: {
            isLogin () {
                return this.$route.name === 'login'
            }
        },
        data () {
            return {
                user: {
                    username: '',
                    email: '',
                    password: ''
                },
                errors: {}  //错误信息
            }
        },
        methods: {
            // 提交表单请求登录
            async onSubmit () {
                try {
                    // 提交表单请求登录
                    const { data } = this.isLogin 
                    ? await login({
                         user: this.user
                     })
                    : await register({
                         user: this.user
                     })


                    // console.log(data)
                    //TODO: 保存用户的登录状态
                    this.$store.commit('setUser', data.user)

                    // 为了防止刷新页面数据丢失，我们需要把数据持久化
                    Cookie.set('user', data.user)

                    // 跳转到首页
                    this.$router.push('/')
                } catch (err) {
                    this.errors = err.response.data.errors
                }
                
            }
        }
    }
</script>

<style scoped>

</style>